Pump.



C. RUNQUIST.

PUMP.

APPLICATION FILED JAN. 28. 1916.

- Patented Apr. 3, 1917.

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n utaaonnea imam, mo. Serial no. 74,730.

To all whom it may concern:

Be it hown that l, CARL RUN nIs'r, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pumps, of which the following is a specification.

My invention relates to pumps and more particularly to rotary fluid pumps or compressors.

Une of the objects of my invention is to improve rotary pumps, to-cheape'n their cost and simplify their construction.

Uther and further objects of my invention will become readily apparent, to persons skilled in the art, from a consideration of the following description when taken in conjunction with the drawings, wherein:

Figure 1 is a side elevation of a pump containing my invention.

Fig. 2 is an end elevation with the cover removed.

Fig. 3 is a longitudinal central section taken on line 33 of Fig. 2.

Fig. 4 is a perspective view of part of the pump body In all the views the same reference charactors are employed to indicate similar parts.

One of the salient objects of my invention is to construct a pump body and piston of such shape that they may readily be made by die casting, of suitable metal that will leave the surfaces as clear and smooth as if they had been tooled, so that the parts will be ready to be assembled as soon as they leave the dies.

in carrying my invention into efl'ect the body part 5 is made of a single piece, and so shaped that it maybe readily taken from the dies after being cast. It is provided with a base 6 and a concentric opening 7, providing a flange 8, of uniform width, between the opening and the outside surface of the casing or body part. The ports 9, which are made into the edge of the flange 8, on opposite sides, as. at 9 and 9', taper of a fragment upwardly into the inner surface defined bythe flange 8. The rotary piston 10, provided with a shaft 11, is set eccentric to the cylinder or opening 7, so that the lower edge of the piston 10 makes intimate contact with the inner surface of the flange 8, as at 12. The piston 10 is uniformly round .specmcatioirof Letters Patent.

It: ILLINUIS.

Patented a a, no.

ing the body part 5 of the pump, by means of a plurahtyof screws 18. The intake pipe 19 and the discharge pipe 20 are secured in plurality bf radially A cap or cover 26, having a hub 17 carrya bearmgofor the shaft 11, is secured tothe cover 26 in front of the ports 9-9 as shown in dotted lines in Fig. 2.

Assuming that the piston 10 is rotating clockwise, air, or other fluid or liquid, will be taken in through the pipe 19 .into the port 9 and drawn into the cylinder 7 by the effect of the receding blade 14, moving away from the port 9, into the cylinder space behind the blade. As the piston progresses the air or other fluid or liquid, will be discharged through the discharge pipe 20 in front of the approaching blade. The blade'leaving the port 9 will continue to draw air into the cylinder it until the next succeeding b ade has passed said port and the air that has previously been drawn in front of the former blade will be compressed as it is forced into the narrower passage as it approaches the discharge port.

The blades 14:. 15 and 16 are of width equal to the thickness of the piston-10, so that there can be no leaks between the sides of the cylinder 7 and said blades orpiston If the direction of rotation of the piston 10 be reversed, then the discharge pipe willv become the intake pipe and the intake pipe will become the discharge pipe and the device will work with equal facility and adace 7, behind peripheral wall of the cylinder at each side registering with the semi-cylindrical por- 10 of the line of contact, each said port having tlon of each port.

a uniform axiallyextending cross section of In. testimony. whereof I hereunto set my semi-cylindrical formation at its lower porhand in the presence of two subscribing tion merging into an upwardly extending witnesses. wall substantially tangential to the periph-p CARL RUNQUIST. eral wall of the rotor inclosing cylinder, In the presence ofand ducts leading axially through an end STANLEY W. 0003,

wall of the casing with their inner ends JMARY F. ALLEN. 

